Improvement in stop-motions for warring-machines



Er S'rA'rns TENT JOHN E. PREST, OF llIILFORD, MASSAOBSETTS.

IMPROVEMENT IN STOP-MOTIONS FOR WARPING-MACl-HNES.

Specification forming part of Letters Patent No. 31,372, dated September17, 1872.

I which the following is a specification, referring by letters to theaccompanying drawing making part of the same, in which- Figure l is afront elevation of the mechanism of said stop-motion and the parts ofthe warping-machine connected therewith. ,Fig 2 is a side elevation andsection of the same. Figs. 3 and 4 exhibit certain modifications Y thatare hereinafter'referred to.

Similar letters indicate like parts in all the gures.

My invention relates to the combination of a series of drop-yarn guidesthat are suspended from the warps, a movable bar or detector operated bya swinging lever or equivalent means, and a latch that retains thebelt-shipper in position to continue the motion of the machine in such amanner that the breaking or running out of any one of the warps dropsits yarn-guide, which arrests the movement of the detector and causesthe swinging lever, by its continued movement, to lift the latch andliberate the belt-shipper, which shifts instantly by the force of aspring and stops the machine.

In the drawing, F is the frame of the machine, having two uprights whichsupport the two yarn-beamsA and B, containing the warps W, which arewound in proper manner on the beam B from the beam A, passing singlythrough the yarn-guides G, which are hung on a horizontal rod, R, whichis removable at pleasure for the purpose of adding to or taking from thenumber of yarn-guides thereon, according to the requirements of themachine or the number of ends to be beamed. Each end passes through oneof the guides G, as shown in Fig. 2, and by the tension of the warpsholds the guides suspended above and out of the way of the horizontalbar or detector l) on the rocker-shaft E, so that the detector may swingfreely beneath the lower ends a. of the guides with a vibratorymovement, imparted to its rocker-shaft by the lever L from some rstmover. The detector is thus continually in motion backward and forwardacross the line or space intowhich the ends a ofthe guides G would dropif released by the warps and permitted' to do so; and the detectorperforms the important function of detecting the releasing and droppingof any single guide, by reason of the breaking or running out of itswarp, and of communicating the eifect to the mechanism which producesthe instantaneous shifting of the belt which drives the machine. This isdone by the end a of the guide dropping in front of the rest H, andbelow it sufficiently to obstruct the backward movement of thedetector-bar D and hold it stationary, so that the continued movement ofthe lever by which it was operated ,shall be directed to liberating thebelt-shifting mechanism to stop the machine. This second function of thelever L is performed by connecting the end of the arm m., extending fromthe lever` L, to an eye, s, at the end of another arm, extending fromthe rocker-shaft E, which eye s for the time serves as a fulcrum to thelever L and arm m, by the continued backward movement of which-in thedirection indicated by the arrows in Fi g. 2-the bend of the lever overthe rocker-shaft is lifted, and with it the overhanging arm p of thelatch k on thexed pin i, and the latch is withdrawn from the catch e inthe shipperrod I, which, being thus liberated, slides endwise by theforce of the spiral spring S, Fig. l, and by so doing shifts the beltand stops the machine until the warp is repaired and its guide iselevated by it out of the way of the detector, when the operation goeson until the accident occurs again and the detector and its liberatingmechanism repeats its movement to stop the machine. Fig. 3 representsanother construction of the drop-yarn guides, having an extension orarm, f, at Vthe rear, by which to elevate the opposite end to receivethe warp-thread; and Fig. 4 represents still another form ofconstruction, in which the guide-eye G is in the rear extension f, whichis depressed by the tension of the warp, and so elevates and suspendsthe forward end a, which arrests the movement of the detector, as beforedescribed.`

Having described my invention, what I claim is The combination 0f thedrop-yarn guides G, the detector D, and the liberating mechanismdescribed for eifectin g the shifting of the belt to stop the machine,substantially as specified.

JOHN E. FEEST.

Witnesses:

Is'AAc A. BROWNELL, DAVID HEATON.

FCE

